/* ============================================
   Othmane Irhboula — Portfolio
   Modern Light & Clean Design System
   ============================================ */

/* ===== CSS VARIABLES ===== */
:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-lighter: #dbeafe;
  --border: #e2e8f0;
  --success: #059669;
  --success-light: #ecfdf5;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 1100px;
  --nav-height: 72px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-title {
  text-align: center;
  margin-bottom: 64px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin: 16px auto 0;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-top: 12px;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--accent-hover);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  background: var(--accent-light);
  color: var(--accent);
  border: none;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.5px;
}

.lang-toggle:hover {
  background: var(--accent);
  color: white;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.nav-hamburger:hover {
  background: var(--bg-secondary);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition);
}

.nav-hamburger span:nth-child(2) {
  margin: 5px 0;
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.2);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition);
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -150px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.07), transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.05), transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 32px;
  font-size: 2rem;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.25);
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 8px;
}

.hero-name {
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.hero-name::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #6366f1);
  border-radius: 2px;
  margin: 20px auto;
}

.hero-title {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 36px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero entrance animation */
.hero-content > * {
  opacity: 0;
  animation: heroFadeIn 0.8s ease forwards;
}

.hero-content > :nth-child(1) { animation-delay: 0.1s; }
.hero-content > :nth-child(2) { animation-delay: 0.2s; }
.hero-content > :nth-child(3) { animation-delay: 0.3s; }
.hero-content > :nth-child(4) { animation-delay: 0.4s; }
.hero-content > :nth-child(5) { animation-delay: 0.5s; }
.hero-content > :nth-child(6) { animation-delay: 0.6s; }
.hero-content > :nth-child(7) { animation-delay: 0.7s; }

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 1s;
  opacity: 0;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.5; }
  50% { transform: rotate(45deg) translate(4px, 4px); opacity: 1; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font);
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ===== ABOUT ===== */
.about-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.about-highlights {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.about-highlight {
  text-align: center;
}

.about-highlight-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.about-highlight-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== EXPERIENCE TIMELINE ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 44px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 48px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -37px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent);
  z-index: 1;
}

.timeline-item.upcoming .timeline-dot {
  background: var(--success);
  box-shadow: 0 0 0 2px var(--success);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 2px var(--success), 0 0 0 4px transparent; }
  50% { box-shadow: 0 0 0 2px var(--success), 0 0 0 8px rgba(5, 150, 105, 0.15); }
}

.timeline-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.timeline-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-company {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 600;
}

.timeline-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.timeline-meta span {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.timeline-desc {
  list-style: none;
}

.timeline-desc li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-desc li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.badge-upcoming {
  background: var(--success-light);
  color: var(--success);
}

/* ===== EDUCATION ===== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.education-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.education-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #6366f1);
}

.education-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.education-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
  color: var(--accent);
}

.education-school {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.education-degree {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.education-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.education-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.project-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.2rem;
  color: var(--accent);
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.project-tag {
  padding: 4px 12px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition), color var(--transition);
}

.project-link:hover {
  gap: 10px;
}

.project-link i {
  font-size: 0.85rem;
}

/* ===== SKILLS ===== */
.skills-content {
  max-width: 900px;
  margin: 0 auto;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.skill-category {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.skill-category-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
}

.skill-tag:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
}

/* Languages */
.languages-section {
  margin-top: 48px;
}

.languages-title {
  text-align: center;
  font-size: 1.3rem;
  margin-bottom: 32px;
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  max-width: 700px;
  margin: 0 auto;
}

.language-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.language-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.language-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.language-level {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.language-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.language-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #6366f1);
  border-radius: var(--radius-full);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0;
}

.language-detail {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== CONTACT ===== */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.contact-link i {
  font-size: 1.2rem;
  color: var(--accent);
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-info span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--text-primary);
  color: var(--text-muted);
  padding: 32px 0;
  text-align: center;
  font-size: 0.85rem;
}

.footer a {
  color: var(--accent-lighter);
}

.footer a:hover {
  color: white;
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 99;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger > .fade-in:nth-child(1) { transition-delay: 0.05s; }
.stagger > .fade-in:nth-child(2) { transition-delay: 0.1s; }
.stagger > .fade-in:nth-child(3) { transition-delay: 0.15s; }
.stagger > .fade-in:nth-child(4) { transition-delay: 0.2s; }
.stagger > .fade-in:nth-child(5) { transition-delay: 0.25s; }
.stagger > .fade-in:nth-child(6) { transition-delay: 0.3s; }

/* ===== PROJECT DETAIL PAGES ===== */
.project-hero {
  padding: 140px 0 60px;
  background: var(--bg-secondary);
  text-align: center;
}

.project-hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.project-hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 24px;
}

.project-hero-tags {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.project-detail {
  padding: 64px 0;
}

.project-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.project-detail-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.project-detail-card h3 {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.project-detail-card h3 i {
  color: var(--accent);
}

.project-detail-card ul {
  list-style: none;
}

.project-detail-card ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.project-detail-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

.project-detail-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.project-detail-card code {
  background: var(--accent-light);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.88em;
  font-weight: 500;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in { opacity: 1; transform: none; }
  .hero-content > * { opacity: 1; }
  .hero-scroll { opacity: 1; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .section { padding: 72px 0; }
  .section-title { margin-bottom: 48px; }
  .about-highlights { gap: 32px; }
  .projects-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100dvh;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    padding: 100px 32px 40px;
    gap: 8px;
    transition: right var(--transition);
    z-index: 999;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    font-size: 1.05rem;
    padding: 12px 0;
    display: block;
    border-bottom: 1px solid var(--border);
  }

  .nav-link::after {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .section { padding: 64px 0; }
  .section-title { margin-bottom: 40px; }

  .hero { min-height: 100dvh; }
  .hero-scroll { display: none; }

  .timeline { padding-left: 36px; }
  .timeline-dot { left: -29px; }

  .education-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }

  .about-highlights { gap: 24px; }
  .about-highlight-number { font-size: 1.5rem; }

  .skills-grid { grid-template-columns: 1fr; }
  .languages-grid { grid-template-columns: 1fr; }

  .contact-links { flex-direction: column; align-items: center; }
  .contact-info { flex-direction: column; align-items: center; gap: 16px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .hero-avatar { width: 80px; height: 80px; font-size: 1.6rem; }
  .hero-cta { flex-direction: column; align-items: center; }

  .timeline-card { padding: 20px; }
  .timeline-header { flex-direction: column; }

  .education-card { padding: 24px; }
  .project-card { padding: 24px; }
  .skill-category { padding: 20px; }

  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}